125536121677 has 2 divisors, whose sum is σ = 125536121678. Its totient is φ = 125536121676.

The previous prime is 125536121651. The next prime is 125536121723. The reversal of 125536121677 is 776121635521.

It is an a-pointer prime, because the next prime (125536121723) can be obtained adding 125536121677 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87359260356 + 38176861321 = 295566^2 + 195389^2 .

It is a cyclic number.

It is not a de Polignac number, because 125536121677 - 2⁷ = 125536121549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125536121177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62768060838 + 62768060839.

It is an arithmetic number, because the mean of its divisors is an integer number (62768060839).

Almost surely, 2^125536121677 is an apocalyptic number.

It is an amenable number.

125536121677 is a deficient number, since it is larger than the sum of its proper divisors (1).

125536121677 is an equidigital number, since it uses as much as digits as its factorization.

125536121677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The spelling of 125536121677 in words is "one hundred twenty-five billion, five hundred thirty-six million, one hundred twenty-one thousand, six hundred seventy-seven".